Problem with Olingo2 and authenticated metadata

@Component("Util")
public class Util {
	public void addUsernamePasswordCredentials(String username, String password, Exchange exchange) {
		final String auth = Base64.encodeBase64String(String.format("%s:%s", username, password).getBytes(StandardCharsets.UTF_8));
		final Map<String, Object> map = new HashMap<>();
		map.put("Authorization", "Basic " + auth);
		exchange.getMessage().getHeaders().put("CamelOlingo2.endpointHttpHeaders", map);
}
}

        <route id="simple-route">
            <from id="route-timer" uri="timer://foo?period=10000"/>
            <bean ref="Util" method="addUsernamePasswordCredentials('DEMO_USER', ‘demo')"/>
            <to id="_to1" uri="olingo2://read/makerdata"/>
            <log id="route-log" message=">>> ${body}"/>
        </route>

Stacktrace
---------------------------------------------------------------------------------------------------------------------------------------
org.apache.camel.RuntimeCamelException: Error reading EDM: Unauthorized
	at org.apache.camel.component.olingo2.Olingo2AppWrapper.getEdm(Olingo2AppWrapper.java:94)
	at org.apache.camel.component.olingo2.Olingo2Endpoint.interceptProperties(Olingo2Endpoint.java:169)
	at org.apache.camel.component.olingo2.Olingo2Producer.process(Olingo2Producer.java:58)
	at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:148)
	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:548)
	at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:201)